GB1137959A - Improvements in or relating to timing circuits - Google Patents

Improvements in or relating to timing circuits

Info

Publication number
GB1137959A
GB1137959A GB55805/66A GB5580566A GB1137959A GB 1137959 A GB1137959 A GB 1137959A GB 55805/66 A GB55805/66 A GB 55805/66A GB 5580566 A GB5580566 A GB 5580566A GB 1137959 A GB1137959 A GB 1137959A
Authority
GB
United Kingdom
Prior art keywords
pulse
pulses
coil
thyristors
leading edge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB55805/66A
Inventor
Edward Raymond Burdett
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
English Electric Co Ltd
Original Assignee
English Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB55805/66A priority Critical patent/GB1137959A/en
Priority to FR129581A priority patent/FR1545300A/en
Priority to JP7648967A priority patent/JPS461045B1/ja
Priority to US689692A priority patent/US3474257A/en
Publication of GB1137959A publication Critical patent/GB1137959A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/35—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region
    • H03K3/352—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region the devices being thyristors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M7/162—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
    • H02M7/1623—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration with control circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
    • H03K17/722—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region with galvanic isolation between the control circuit and the output circuit
    • H03K17/723—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region with galvanic isolation between the control circuit and the output circuit using transformer coupling

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Relay Circuits (AREA)
  • Particle Accelerators (AREA)

Abstract

1,137,959. Gating circuits. ENGLISH ELECTRIC CO. Ltd. 13 Dec., 1967 [13 Dec., 1966], No. 55805/66. Heading H3T. [Also in Division H2] A rectified timed output signal is obtained from a plurality of A.C.-fed thyristors which are fired sequentially by a train of pulses gated by a pulse of predetermined duration produced from the leading edge of an initiating pulse. In Fig. 1, such a circuit is used to energize the operating coil 11 of an electromagnetic circuit breaker at a precise instant. Unit 17 produces a pulse for each cycle of each phase of the A.C. supply and applies these pulses continuously to transistor 15. Unit 21 produces long negative pulses of much lower repetition rate which are differentiated by an RC circuit 18-20 and applied to transistor 16 to allow a certain number of pulses from 17 to reach transformer 14 and fire the thyristors T1-T3. These conduct sequentially in successive halfcycles of the A.C. supply and their conduction periods overlap to send a fluctuating D.C. pulse through the coil 11 (Fig. 2f, not shown). The commencement of this pulse is set by the instant of the first pulse from 17 which follows the leading edge of a pulse from 21. The duration of the pulse through the coil 11 can be varied by resistor 20 which determines how many pulses from 17 can pass through the transistors before transistor 16 is cut-off by the end of the differentiated pulse. The unit 17 can be an independent pulse generator of high frequency, in which case the leading edge of the pulse from 21 determines the start of current through the coil 11. The half-wave arrangement of T1-T3 can be replaced by a three-phase bridge using three thyristors and three diodes. Separate trains of phased pulses can be generated for each thyristor.
GB55805/66A 1966-12-13 1966-12-13 Improvements in or relating to timing circuits Expired GB1137959A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB55805/66A GB1137959A (en) 1966-12-13 1966-12-13 Improvements in or relating to timing circuits
FR129581A FR1545300A (en) 1966-12-13 1967-11-24 Timing circuit
JP7648967A JPS461045B1 (en) 1966-12-13 1967-11-30
US689692A US3474257A (en) 1966-12-13 1967-12-11 Timing circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB55805/66A GB1137959A (en) 1966-12-13 1966-12-13 Improvements in or relating to timing circuits

Publications (1)

Publication Number Publication Date
GB1137959A true GB1137959A (en) 1968-12-27

Family

ID=10474935

Family Applications (1)

Application Number Title Priority Date Filing Date
GB55805/66A Expired GB1137959A (en) 1966-12-13 1966-12-13 Improvements in or relating to timing circuits

Country Status (3)

Country Link
US (1) US3474257A (en)
JP (1) JPS461045B1 (en)
GB (1) GB1137959A (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3134068A (en) * 1961-10-23 1964-05-19 Cons Electrodynamics Corp Power supply for developing a regulated direct current signal from a three-phase supply
US3281645A (en) * 1962-12-31 1966-10-25 Cutler Hammer Inc Controlled-rectifier systems
US3310686A (en) * 1963-06-14 1967-03-21 Rca Corp Flip flip circuits utilizing set-reset dominate techniques
GB1105750A (en) * 1964-12-22 1968-03-13 English Electric Co Ltd Converter arrangements
US3399337A (en) * 1966-11-10 1968-08-27 Harnischfeger Corp Electrical control circuit for converting alternating current to adjustable magnitude direct current

Also Published As

Publication number Publication date
JPS461045B1 (en) 1971-01-12
US3474257A (en) 1969-10-21

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